平均: average; mean保持: keep; hold; retain; maintain ...量: measure capacity平均保持时间: aht average holding time保持量: maintenance dose初保持量: initial retention初始保持量: initial retention净保持量: net retention; net(t) retention平均保费: average premium平均保险费: average premium; level of premium化学剂保持量: retention净干盐保持量: retention by assay平均保险费率: average rate甘油保持量试验: glycerol-retention test平均保养间隔期: meantime between maintenance平均保养间隔时间: mean time between maintenance; mtrm持量: field component平均保险费率 平均价格 平均速度 时价率: averagerate峰值保持平均: peak-hold averaging磁持量: magnetic-field component维持量: maintenance dose综合支持量: aggregate measure of support; ams保持: (维持; 使不消失或减弱) keep; hold; retain; maintain; preserve 保持安静 keep quiet; 保持优势 hold on to a dominant [favorable] position; 保持警惕 maintain vigilance; be on the alert; 保持清洁 keep clean; 保持优良传统 preserve good traditions; 保持劳动人民的本色 retain the characteristics of the working people; 保持冷静的头脑 keep a cool head; keep cool; 保持跳高纪录 retain the high jump record; 保持优良品质 retain the fine qualities; 保持党政机关的廉洁 keep the party and government departments honest and clean; 保持活力 maintain vitality; 保持均势 maintain parity; 保持安全距离 wide berth初期身体持量: initial body retention农产品综合支持量: ams